IBM 6589 - PC 365 - 32 MB RAM User manual

IBM
Technical Information Manual
PC 365 (Type 6589)
S84H-0334-01

IBM Technical Information Manual
PC 365 (Type 6589)
S84H-0334-01

Note
Before using this information and the product it supports, be sure to read the general information under
Appendix E, “Notices and Trademarks” on page 51.
Second Edition (March 1997)
The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with
local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION “AS IS” WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied
warranties in certain transactions, therefore, this statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information
herein; these changes will be incorporated in new editions of the publication. IBM may make improvements and/or changes in the
product(s) and/or the program(s) described in this publication at any time.
This publication was developed for products and services offered in the United States of America. IBM may not offer the products,
services, or features discussed in this document in other countries, and the information is subject to change without notice. Consult
your local IBM representative for information on the products, services, and features available in your area.
Requests for technical information about IBM products should be made to your IBM reseller or IBM marketing representative.
 Copyright International Business Machines Corporation 1996, 1997. All rights reserved.
Note to U.S. Government Users — Documentation related to restricted rights — Use, duplication or disclosure is subject to
restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Manual Style . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Chapter 1. System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
System Software Features ............................................ 2
Chapter 2. System Board Features ...................................... 4
Microprocessor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Dual Processing Support ............................................. 4
Chip Set Control .................................................. 5
Input/Output Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Riser Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Physical Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Chapter 3. Adapters and Internal Drives .................................. 17
Graphics Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SCSI Adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Internal Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chapter 4. Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Component Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Output Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Chapter 5. Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Chapter 6. System Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Hardware Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Software Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Appendix A. Connector Pin Assignments .................................. 30
System Memory Connectors ........................................... 30
EIDE Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Diskette Drive Connector ............................................. 34
Serial Port Connector ............................................... 35
Parallel Port Connector .............................................. 35
Keyboard and Mouse Port Connectors ..................................... 36
USB Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Infrared Port Connector .............................................. 37
ISA Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
PCI Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Appendix B. System Address Maps ..................................... 42
System Memory Map ............................................... 42
Input/Output Address Map ............................................ 43
DMA I/O Address Map ............................................... 44
 Copyright IBM Corp. 1996, 1997 iii

Appendix C. IRQ and DMA Channel Assignments ............................ 46
Appendix D. Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
POST Error Codes ................................................. 48
Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Appendix E. Notices and Trademarks .................................... 51
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
iv Technical Information Manual

Tables
1. System Resource Assignments for PCI-to-ISA Bridge ......................... 6
2. System Resource Assignments for EIDE Interface ........................... 7
3. System Resource Assignments for USB Interface ........................... 8
4. Serial Port Assignments .......................................... 9
5. Parallel Port Assignments ......................................... 10
6. System Resource Assignments for the Keyboard and Mouse ..................... 11
7. System Resource Assignments for the Real-Time Clock ........................ 12
8. Riser Card Characteristics ......................................... 13
9. J3 - System Power Connection ...................................... 15
10. J11, J13 - Wake on Modem Ring Connections ............................. 15
11. J15 - Wake on LAN Connection ...................................... 15
12. J8 - CMOS-Clear Jumper .......................................... 15
13. Switches 1 to 6 for Microprocessor Speeds ............................... 16
14. Switch 8 for Diskette Write-Protection ................................... 16
15. System Resource Assignments for the S3 Trio64V+ Adapter ..................... 17
16. System Resource Assignments for the Matrox Adapter ........................ 18
17. Diskette Drives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
18. Hard Disk Drives ............................................... 19
19. Drives with Optical Media .......................................... 19
20. Power Input Requirements ......................................... 20
21. Power Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
22. System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
23. Keyboard Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
24. Auxiliary Device Port ............................................ 21
25. ISA-Bus Adapters (Per Slot) ........................................ 21
26. PCI-Bus Adapters (Per Slot) ........................................ 21
27. Internal Devices (DASD) .......................................... 22
28. Pin Assignments for 4-Pin Power Connectors .............................. 23
29. Pin Assignments for 6-Pin Power Connectors .............................. 23
30. Pin Assignments for 3-Pin Power Connectors .............................. 23
31. Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
32. Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
33. Air Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
34. Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
35. Heat Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
36. Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
37. 5.25-Inch Diskette Drive Reading, Writing, and Formatting Capabilities ............... 28
38. 3.5-Inch Diskette Drive Reading, Writing, and Formatting Capabilities ................ 28
39. 168-Pin Assignments for the System Memory Connector ....................... 30
40. 40-Pin Assignments for the EIDE Connectors .............................. 33
41. 34-Pin Assignments for the Diskette Drive Connector ......................... 34
42. 9-Pin Assignments for the Serial Port Connector ............................ 35
43. 25-Pin Assignments for the Parallel Port Connector .......................... 35
44. 6-Pin Assignments for the Keyboard Connector ............................. 36
45. 6-Pin Assignments for the Mouse Connector .............................. 36
46. 4-Pin Assignments for the USB Connector ................................ 37
47. 9-Pin Assignments for the Infrared Connector .............................. 37
48. 98-Pin Assignments for the ISA Connector ................................ 38
49. 124-Pin Assignments for the PCI Connector ............................... 40
50. System Memory Map ............................................ 42
 Copyright IBM Corp. 1996, 1997 v

51. I/O Address Map ............................................... 43
52. DMA I/O Addresses ............................................. 44
53. IRQ Channel Assignments ......................................... 46
54. DMA Channel Assignments ........................................ 47
55. POST Error Codes ............................................. 48
56. Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Figures
1. System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2. System Memory (DIMM) Connector .................................... 30
3. EIDE Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4. Diskette Drive Connector .......................................... 34
5. Serial Port Connector ............................................ 35
6. Parallel Port Connector ........................................... 35
7. Keyboard and Mouse Port Connectors .................................. 36
8. USB Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
9. Infrared Port Connector ........................................... 37
10. ISA Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
11. PCI Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
vi Technical Information Manual

Preface
This Technical Information Manual provides information for the IBM PC 365 (Type 6589). It is intended
for developers who want to provide hardware and software products to operate with this IBM computer
and provides a more in-depth view of how this computer works. Users of this publication should have an
understanding of computer architecture and programming concepts.
Manual Style
Warning: The term reserved describes certain signals, bits, and registers that should not be changed.
Use of reserved areas can cause compatibility problems, loss of data, or permanent damage to the
hardware. When the contents of a register are changed, the state of the reserved bits must be preserved.
When possible, read the register first and change only the bits that must be changed.
In this manual, some signals are abbreviated. A minus sign in front of the signal indicates that the signal
is active low. No sign in front of the signal indicates that the signal is active high.
The use of the letter “h” indicates a hexadecimal number. Also, when numerical modifiers such as “K”,
“M” and “G” are used, they typically indicate powers of 2, not powers of 10. For example, 1 KB equals
1024 bytes (2 10), 1 MB equals 1048576 bytes (2 20), and 1 GB equals 1073741824 bytes (230).
When expressing storage capacity, MB equals 1000 KB (1024000). The value is determined by counting
the number of sectors and assuming that every two sectors equals 1 KB.
Note: Depending on the operating system and other system requirements, the storage capacity available
to the user might vary.
 Copyright IBM Corp. 1996, 1997 vii

Related Publications
In addition to this manual, the following IBM publications provide information related to the operation of the
PC 365. To order publications in the U.S. and Puerto Rico, call 1-800-879-2755. In other countries,
contact an IBM reseller or an IBM marketing representative.

Using Your Personal Computer
This publication contains information about configuring, operating, and maintaining the PC 365. Also,
information on diagnosing and solving problems, how to get help and service, and warranty issues is
included.

Installing Options in Your Personal Computer
This publication contains instructions for installing options in the PC 365.

Understanding Your Personal Computer
This publication includes general information about using computers and detailed information about the
features of the PC 365.

PC 365 System (Type 6589) Compatibility Report
This publication contains information about compatible hardware and software for the PC 365. This
publication is available at http://www.pc.ibm.com/cdt .

S3 Trio64V+ SVGA Device Driver Installation Instructions
This publication contains instructions for installing device drivers for the S3 Trio64V+ SVGA Graphics
Adapter installed in some models.

Matrox MGA Millennium Graphics Adapter Software Installation Guide
This publication contains instructions for installing device drivers for the Matrox MGA Millennium
Graphics Adapter installed in some models. Also, this publication includes troubleshooting information
for related video problems.

Adaptec SCSI Support Package
This documentation, which is provided with models that have an IBM-installed SCSI adapter, includes
information on configuring the adapter and instructions for installing and configuring SCSI devices.

PC 365 Microprocessor Upgrade Installation Instructions
This publication contains information about installing a second Pentium Pro microprocessor on the
system board.
viii Technical Information Manual

Chapter 1. System Overview
Chapter 1. System Overview
The IBM PC 365 (Type 6589) is a versatile product designed to provide state-of-the-art computing power
with room for future growth. Several model variations are available.
Hardware Features
Standard features in all models:
Intel Pentium Pro microprocessor with 256 KB of internal L2 cache
Dual processing support
Support for up to 512 MB of system memory
Enhanced IDE (EIDE) interface
Hard disk drive (EIDE or Fast/Wide SCSI)
One 3.5-inch, 1.44 MB diskette drive
One high-speed serial port
One high-speed parallel port
One monitor port provided with the graphics adapter
One universal serial bus port
One infrared port capable of supporting a 4 Mbps infrared transceiver
Keyboard and mouse ports
104-key keyboard and mouse provided
Standard features that vary by model:
Graphics adapter - S3 Trio64V+ SVGA Graphics Adapter
or Matrox MGA Millennium Graphics Adapter
Riser card - 3 shared ISA/PCI connectors, 2 dedicated ISA connectors
or 3 shared ISA/PCI
connectors, 2 dedicated PCI connectors
Drive with optical media1 - CD-ROM drive
or PD/CD-ROM drive
Standard features in some models only:
Adaptec AHA-2940 Ultra Wide SCSI Adapter
Fast/Wide SCSI hard disk drive
Multimedia port for optional video features (provided with the Matrox MGA Millennium Graphics
Adapter)
1Some models do not have this IBM-installed feature.
 Copyright IBM Corp. 1996, 1997 1

Chapter 1. System Overview
System Software Features
The PC 365 supports a variety of operating systems. Refer to Using Your Personal Computer for a listing
of supported operating systems
Note: Some models are shipped with a preloaded version of Windows NT Workstation. Also, a
Ready-to-Configure (RTC) CD-ROM is included with all models. The RTC CD-ROM has
applications and device driver support for Windows NT Workstation, Windows 95, and OS/2 Warp.
System software includes:
Basic input/output system (BIOS)
Plug and Play
Power-on self-test (POST)
Configuration/Setup Utility program
Advanced Power Management (APM)
Flash update utility program
Diagnostic programs
BIOS
The computer system uses the IBM SurePath BIOS. Enhancements to the BIOS software have been
added to provide support for the following features:
PCI bus, according to
PCI BIOS Specification 2.1
PCI bus-master EIDE interface
Plug and Play, according to Plug and Play BIOS Specification 1.1
Advanced Power Management (APM), according to APM BIOS Interface Specification 1.2
APIC (advanced programmable interrupt controls)
Multiple microprocessors, according to Multiprocessor Specification 1.4
Matrox video BIOS for the Matrox MGA Millennium Graphics Adapter
Bootable CD-ROM
Plug and Play
The system conforms to the following:

Plug and Play BIOS Specification 1.1
 Plug and Play BIOS Specification, Errata and Clarification 1.0
The system follows the guidelines described in the following:

Plug and Play BIOS Extension Design Guide 1.0
 Guide to Integrating the Plug and Play BIOS Extensions with System BIOS 1.2
 Plug and Play Kit for DOS and Windows
POST
The computer uses IBM power-on self-test (POST) software. Also, initialization code is included for the
Pentium Pro microprocessor, the 82440FX chip set, the I/O chip, and the Matrox MGA Millennium
Graphics Adapter.
POST software locates any hardware problems or configuration changes. If an error occurs while POST
is running, an error code in the form of a text message displays on the screen. For a description of a
POST error code, see “POST Error Codes” on page 48.
2Technical Information Manual

Chapter 1. System Overview
Configuration/Setup Utility Program
The Configuration/Setup Utility program provides menus for selecting options for devices, I/O ports, date
and time, system security, start options, advanced setup, ISA legacy resources, and power management.
More information on using the Configuration/Setup Utility program is provided in Using Your Personal
Computer .
Advanced Power Management
The PC 365 comes with energy-saving software that meets Energy Star requirements. Advanced Power
Management (APM) is a feature that reduces the power consumption when the entire system or
components of the computer system are not in use. When enabled, APM initiates reduced-power modes
for the monitor, microprocessor, hard disk drive, or the entire system after a specified period of inactivity is
reached.2
APM is implemented according to APM BIOS Interface Specification 1.2 . For more information on APM,
see Using Your Personal Computer and Understanding Your Personal Computer .
Flash Update Utility Program
The flash update utility is a stand-alone program to support flash code updates. This utility program
updates the BIOS code in flash and the MRI to different languages. The flash update utility program is
available on a 3.5-inch diskette.
Diagnostic Programs
Two diagnostic products are supplied with the PC 365: QAPlus/WIN-WIN, a Windows program, provides
the best software coverage; QAPlus/PRO for DOS provides the best hardware coverage. For more
information on these diagnostic programs, see Using Your Personal Computer .
2APM does not support small computer system interface (SCSI) hard disk drives.
Chapter 1. System Overview 3

Chapter 2. System Board Features
Chapter 2. System Board Features
This section includes information about system board features. To view an illustration of the system
board, see “System Board” on page 14.
For a list of features provided with the PC 365, see “Hardware Features” on page 1.
Microprocessor
The primary microprocessor in the PC 365 is the Intel P6, called the Pentium Pro. A voltage regulator
circuit on the system board provides the required power for the primary microprocessor. The Pentium Pro
microprocessor features:
Dynamic execution technology
Multiprocessing support
Optimization for 32-bit software
Internal L2 cache
– 4-way set associative
– Non-blocking
– 1 GB/second bandwidth communication with the microprocessor core
64-bit data bus
36-bit address bus
Upgradable to future Overdrive microprocessors
Math coprocessor
Note: Refer to
http://www.intel.com for more information on the Intel Pentium Pro microprocessor.
The microprocessor plugs directly into a zero-insertion-force (ZIF) socket (socket 8) on the system board.
Socket 8 allows for a performance upgrade. After an upgrade is installed, the internal speed of the
primary microprocessor is updated by setting switches on the system board (see “Switches” on page 16).
Dual Processing Support
The combined technologies of the system board and the microprocessor provide support for dual
processing. The dual processing configuration is known as symmetric multiprocessing (SMP). The
PC 365 provides:
Power-supply margins for dual processing
Thermal margins for dual processing
A multiprocessor interrupt controller (for advanced programmable interrupt controls (APIC) on the
system board)
Code for APIC initialization
On the system board, directly beside the primary microprocessor, a second socket 8 is provided for
installing a second Pentium Pro microprocessor. Also, sockets are provided for connecting a
voltage-regulator module which supplies power to the second microprocessor, and a fan (part of a fan-sink
assembly), which helps cool the second microprocessor. To locate these connectors, see “System Board”
on page 14.
An upgrade kit for the PC 365 is an available option from IBM. The upgrade kit includes a Pentium Pro
microprocessor, a fan-sink assembly, a voltage-regulator module, and instructions for installation.
4  Copyright IBM Corp. 1996, 1997

Chapter 2. System Board Features
Chip Set Control
The PC 365 uses the second-generation Intel 82440FX chip set. This chip set provides a bridge between
the peripheral component interconnect (PCI) bus and the microprocessor bus. (For information on the PCI
bus, see “PCI-to-ISA Bridge” on page 6.) Also, this chip set controls the system memory interface.
The PC 365 also uses the PIIX3 chip. This chip provides a bridge between the PCI and the industry
standard architecture (ISA) buses, a bus-master, enhanced integrated drive electronics (EIDE) interface,
and a universal serial bus (USB) port.
System Memory
Four dual inline memory module (DIMM) connectors are provided on the system board. The DIMM
connectors are powered by + 3.3 volts. Each DIMM connector is a 168-pin, gold-lead socket. For the pin
assignments, see “System Memory Connectors” on page 30.
The system board supports:
A maximum of 512 MB (128 MB modules in all four connectors).
Dynamic random access memory (DRAM) only.
64-bit (EDO) and 72-bit (ECC) wide memory modules.
Any configuration of DIMMs is acceptable. Characteristics
required by DIMMs include:
168-pin, unbuffered +3 V modules only.
Gold-lead tabs only.
60 nanosecond access speeds only.
Height of no more than 3.81 cm (1.5 in.).
To enable error-correcting code, all installed memory must be of the ECC type (a combination of ECC
and nonparity types is configured as nonparity)
Note: Single inline memory modules (SIMMs) are not supported in the PC 365.
Chapter 2. System Board Features 5

Chapter 2. System Board Features
PCI-to-ISA Bridge
The PIIX3 chip provides the bridge between the peripheral component interconnect (PCI) and industry
standard architecture (ISA) buses. The chip is used to convert PCI bus cycles to ISA bus cycles.
The PCI bus is compliant with
PCI Local Bus Specification 2.1 . The PCI bus runs synchronously to the
host bus and is driven at a frequency of 30 or 33 MHz, depending on the speed of the microprocessor bus
(60 MHz or 66 MHz). The ISA bus operates at speeds of 7.5 MHz or 8.33 MHz (one-quarter of the PCI
bus speed).
For information on the expansion connectors to the PCI and ISA buses, see “Riser Card” on page 13.
The following table shows the system resources used for the PCI-to-ISA bridge.
Note: When the computer is started, the resource assignments are subject to change during the
power-on self-test (POST).
The chip that provides the PCI-to-ISA bridge also includes all the subsystems of the ISA bus. These
ISA-compatible subsystems are:
Two cascaded 82C59 interrupt controllers
Two 82C37 DMA controllers with four 8-bit and three 16-bit channels
Three counters equivalent to a 82C54 programmable interval timer
Power management features
Table 1. System Resource Assignments for PCI-to-ISA Bridge
System Resource Assignment
ROM None
RAM None
I/O (hex) 00-0F, 20-43, 61, 70, 80-8F, 92, A0-BF, C0-DE, EE-F1, F4-F5
IRQ NMI, 0, 2
DMA None
6Technical Information Manual

Chapter 2. System Board Features
Bus Master EIDE Interface
The system board incorporates a PCI bus master, enhanced integrated drive electronics (EIDE) interface
that complies with AT Attachment Interface with Extensions ; this allows concurrent operations on the PCI
and EIDE buses.
The subsystem that controls internal devices is integrated with the EIDE interface. Up to four IDE devices
can be attached to the system board through a ribbon cable that connects to one of two connectors on the
system board. The IDE devices receive their power through a four-position power cable containing +5,
+12, and ground voltage.
When devices are added to the EIDE interface, one device is designated as the primary, or master, device
and another is designated as the secondary, or subordinate, device. These designations are determined
by switches or jumpers on each device. A bootable hard disk drive can be installed on either EIDE
connector.
Note: An IDE expansion adapter is not supported.
For a list of devices that might be installed in the computer, see “Internal Drives” on page 19.
The following table shows the system resources used by the EIDE interface.
Note: When the computer is started, the resource assignments are subject to change during the
power-on self-test (POST).
Two 40-pin connectors are provided on the system board for the EIDE interface. For information on the
pin assignments, see “EIDE Connectors” on page 33.
Table 2. System Resource Assignments for EIDE Interface
System Resource Assignment
ROM None
RAM None
I/O (hex) 170-177, 1F0-1F7, 376-377, 3F6-3F7
IRQ 14, 15
DMA None
Chapter 2. System Board Features 7

Chapter 2. System Board Features
USB Interface
Universal serial bus (USB) technology is a standard feature of the computer. The system board provides
the USB interface with one connector. A USB-enabled device can be attached to the connector, and if
that device is a hub, multiple peripheral devices can be attached to the hub and be used by the system.
The USB connector uses Plug and Play technology for installed devices. The speed of the USB is up to
12 Mb/second with a maximum of 255 peripheral devices.
The USB is compliant with
Universal Host Controller Interface Design Guide 1.0 . Features provided by
USB technology include:
Support for hot pluggable devices
Support for concurrent operation of multiple devices
Suitable for different device bandwidths
Connections of up to five meters in length from host to hub or hub to hub
Guaranteed bandwidth and low latencies appropriate for specific devices
Wide range of packet sizes
Limited power to hubs
The following table shows the system resources used by the USB interface.
Note: When the computer is started, the resource assignments are subject to change during the
power-on self-test (POST).
At the rear of the computer, one 4-pin connector is provided for the USB interface. For information on the
pin assignments, see “USB Connector” on page 37.
Table 3. System Resource Assignments for USB Interface
System Resource Assignment
ROM None
RAM None
I/O (hex) Assigned by POST
IRQ Assigned by POST
DMA None
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Chapter 2. System Board Features
Input/Output Controller
Control of the integrated input/output (I/O) ports and diskette drive is provided by a single chip, the
National Semiconductor PC87308. This chip, which is compatible with Plug and Play ISA
Specification 1.0 , is a controller for the following:
Diskette drive support
Serial port
Parallel port
Keyboard and mouse ports
Infrared port
General-purpose I/O ports
Real-time clock
Diskette Drive Support
The cable provided with your computer supports a maximum of two diskette drives and one tape backup
drive (see “Internal Drives” on page 19 for more information). The following is a list of devices that the
diskette drive subsystem will support:
1.44 MB, 3.5-inch diskette drive
1.2 MB, 5.25-inch diskette drive
1 Mbps, 500 Kbps, or 250 Kbps tape drive
Note: A 2.88 MB, 3.5-inch diskette drive is not supported.
One 34-pin, berg-strip connector is provided on the system board for the diskette drive. For information
on the connector pin assignments, see “Diskette Drive Connector” on page 34.
Serial Port
Two universal asynchronous receiver/transmitter (UART) serial ports are integrated into the system board.
Both ports include a 16-byte data first-in first-out (FIFO) buffer, are 16550A compatible, and have
programmable baud-rate generators.
One of the UART serial ports is used in the normal mode. The other serial port is configured as an
infrared port (see “Infrared Port” on page 10).
The following table shows the default port assignments for the serial port used in the configuration.
Note: When the computer is started, the resource assignments are subject to change during the
power-on self-test (POST).
On the system board, one 9-pin, male connector is provided for the serial port. For information on the
connector pin assignments, see “Serial Port Connector” on page 35.
Table 4. Serial Port Assignments
Port Assignment Address Range IRQ Level
Serial 1 03F8h–03FFh IRQ4
Serial 2 02F8h–02FFh IRQ3
Serial 3 03E8h–03FFh IRQ4
Serial 4 02E8h–02FFh IRQ3
Chapter 2. System Board Features 9

Chapter 2. System Board Features
Infrared Port
Two UART serial ports are integrated into the system board. One of these ports is configured into an
infrared port. When an optional infrared module is attached to the port, the computer is capable of
transmitting and receiving wireless communications with other infrared-enable devices.
The infrared module plugs directly into the infrared port and provides a link of up to one meter. The
infrared port uses any of the same four assignments as the serial port. The infrared port is compliant with:
IrDA-2, including 4 Mbps, 1.2 Mbps, and 1.15 Mbps baud rates
Sharp-IR
TV-Remote mode
The system board has one 9-pin connector for the infrared port. For information on the connector pin
assignments for the infrared port, see “Infrared Port Connector” on page 37.
Parallel Port
Support for extended capabilities port (ECP), enhanced parallel port (EPP), and standard parallel port
(SPP) modes is integrated into the system board. The modes of operation are selected through the
Configuration/Setup Utility program with the default mode set to SPP. The ECP and EPP modes are
compliant with IEEE 1284.
The following table shows the default port assignments for the parallel port used in configuration.
Note: When the computer is started, the resource assignments are subject to change during the
power-on self-test (POST).
On the system board, one 25-pin connector is provided for the parallel port. For information on the
connector pin assignments, see “Parallel Port Connector” on page 35.
Table 5. Parallel Port Assignments
Port Assignment Address Range IRQ Level
Parallel 1 03BCh–03BEh IRQ7
Parallel 2 0378h–037Fh IRQ5
Parallel 3 0278h–027Fh IRQ5
10 Technical Information Manual